Record-tablet for talking-machines.



O. O. BROPHY.

RECORD TABLET FOR TALKING MACHINES. APPLICATION FILED MAB..21, 1 9l3.

, 77, Patented Jan. 26, 1915.

RECORD-TAIBM'I. FOR. TALKING-MACHINES.

Application filed March 21, 1913.

To all whom it may concern Be it known that l, OWEN O. BROPUY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Record-Tablets for Talking-Machines, of which the following is a specification.

()ne object of my invention is to provide means for automatically stopping a talking machine at the end of a record.

A further object of the invention is to locate an electric contact plate in the record tablet in such a manner that the formation of the record will not expose the plate: the plate being. so arranged that it can be exposed at the end of the record.

A still further object of the invention is to so use such a record tablet that a phonographic machine in which a stylus is used may serve as one terminal of an electric circuit, and the post on which the record tablet is mounted will be the other terminal, such post being in electrical engagement with the contact plate when the record tab-- let is placed thereon.

These objects I attain in the following manner, reference being had to the accompanying drawing, in which Figure 1, is a diagrammatic view of a talking machine of the disk type, illustrating my invention; Fig. 2, is a. plan view of the phonographic record tablet, illustrating my invention; Fig. 3, is a sectional plan view of the record tablet, showing the contact plate in full lines; Fig. 4, is a trans-v verse sectional view, on the line a-a, Fig. 9. of the phonographic record tablet showing the contact plate embedded therein: Fig. 5, is a sectional view on the line b?), Fig. 4.; Fig. 6,is a transverse sectional view of a double phonographic record tablet, showing the contact late located midway between the sides: ig. 7, is a view illustrating a modification of the contact plate; and Fig. 8, is a view of a record cylinder showing the contact plate in position therein.

Referring to the drawing, 1 is the casing of a talking machine of any suitable type.

2 is the post on which the rotating table 3 is mounted and resting on this table is the record tablet 4 of the disk type.

5 is the arm carrying the stylus 6 under which the record tablet travels, the stylus following the record grooves in said tablet.

7 is any suitable brake mechanism arranged to bear against the table 3 when it Specification of letters Patent.

Patented Jan. 26, Mile).

Serial No. 755,944.

.is desired to stop therotation of said table,

and 8 is a battery connected, in the present instance, to the post? as one terminal and to the stylus (5' as the other terminal. as illustrated in Fig. 1.

The record tablet 4 is made in the ordinary manner with the exception that inserted in the body of the tablet is a metallic contact plate 9 having a hole 10 of the same diameter as the post. This hole has. preferably, a neat fit on the reduced end of the post 2, so as to form a continuation of the electric terminal. The plate 9 is located .within the record tablet sufficiently far below the surface thereof so that the formation of the record therein will not expose the contact plate. The. contact plate can be exposed by making a deep cut 9' in the tablet at the end of the record groove.

As the record tablet rotates under the stylus, the stylus follows the record groove and after this is discontinued, the stylus will drop into the deep groove 9 and rest directly on the contact plate 9, thus completing the circuit and applying the brake,

indicated at 7, which stops dig-rotation of the table and the record tablet. The record tablet can then be removed from the table and another record tablet placed thereon and the stylus adjusted at the roper oint.

In Fig. 4:, a single record ta let is s own with the plateembedded on one face.

In Fig. 5, I have illustrated a double faced record tablet and in this instance the metallic plate 9 is placed midway between the two faces, so that while the formation of the record on either face will not expose the metal contact plate, the tablet can be cut to expose the plate on either side. The form of the cut 9* may be varied according to the character of the plate, but I prefer to make the cut as illustrated in Fig. 5 and bevel the disk on each side of the exposed portion of the .plate so as not to damage or destroy the stylus.

in Fig. 7, T have illustrated a modification of the contact plate, which may be used in place of the plate shown in Fig. 3.

This plate has a ring section 11 and a cross a member 12 having an opening therein to receive the end of the ost so that the plate can be exposed immediately at the end of the record at any point above the ring section 11.

In Fig. 8, I have illustrated my invention as applied to a cylindrical record, in

too

which a plate 13 is embedded .in the record 14. I

I claim 1. A talkin machine record having an isolated meta lic plate embedded therein,- said record having its surface recessed to expose said plate, and said plate having a contact surface independent of that exposed by recessin the record.

2. A dou le faced talking machine record tablet having a metallic contact plate embedded axially therein intermediate its two faces so that a portion of such plate may be exposed by re'cessing either or both faces,

said plate being apertured centrally with respect to the tablet to form a contact surface independent of that exposed by recessing the record. a

3. A talking machine record tablet having a central opening and a contact plate embedded in said tablet and having an openin in line with the central opening of the tab et whereby it may contact with the record driving post, said contact plate being inwardly dis osed with respect to the record surface 0 the tablet and being exposed for engagement by the stylus by re cessing the face of the record tablet at the end of the record groove.

4:. A talking machine record tablet having a metallic contact late centrally embedded therein, said tab et and plate being apertured for the reception of a post upon which it is to be mounted for rotatlon,

"whereby said post Will make contact with name to this specification, in the presence of two subscribing Witnesses.

' OWEN 0. BRUPHY Witnesses WM. 1E. Snore, WM. A. BARR. 

